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Nonconventional Yeasts and Bacteria

95 bytes added, 07:59, 21 July 2017
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=====Ethanol Resistance=====
All 10 strains were also tested for their ability to grow in 5-10% ethanol content. The table below shows that all but one strain was able to grow in presence of 5% total alcohol but one thing they all shared in common is their inability to grow when in the presence of 10% alcohol. <ref name="10 strain TD"></ref>
Growth (+) positive; (−) negative.
=====Sugar Utilization=====
During fermentation trials of these 10 strains mentioned, sugar content was measured both before and after fermentation via HPLC. Tests showed the the sugar utilization of ''T Delbruekii'' is very strain dependent. However all of the strains but one were shown to not ferment Maltose and Maltotriose. Although these tests do not show if these strains are able to utilize Lactose, Eureka Brewing's blog mentions that they are unable to metabolize it. The table below shows the percentages of sugars metabolized in the test wort by each strain.<ref name="10 strain TD"></ref>
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=====Cross Resistance=====
Again, all 10 strains growth was tested but this time with the presence of both 5% ethanol as well as 50 and 90 PPM of iso-alpha acid concentrations. Below you can see that with a combination of these two factors, growth was hindered in quite a few strains.<ref name="10 strain TD"></ref>
Growth (+) positive; (−) negative.
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